Bone Repairing Kit and Method for Bone Repair

ABSTRACT

A bone repairing kit including a drilling device, a pushing device, a clamping member and a hole saw is provided. An end of a tube body of the drilling device is a knife portion. When the tube body rotates with respect to a femur, a bone column is cut by the knife portion and located in the tube body. The pushing device includes a hollow tube and a push bar. The hollow tube is for receiving the tube body. The push bar is for touching and pushing the bone column in the tube body. The clamping member is for clamping the bone column. The hole saw includes a receiving body and cutting knives. The receiving body has a recess for receiving an end of the bone column. The cutting knives surrounding on an inner wall of the recess are for cutting an edge of the end of the bone column.

This application claims the benefit of Taiwan application Serial No.098145620, filed Dec. 29, 2009, the subject matter of which isincorporated herein by reference.

TECHNICAL FIELD

The disclosure relates in general to a bone repairing kit and a methodfor bone repair, and more particularly to a bone repairing kit which iscapable of rebuilding a femur with osteonecrosis and a method for bonerepair.

BACKGROUND

There are sixty bones in the lower extremity of the human body, and twoof the bones are femurs. The femur is the longest and strongest bone inthe lower extremity of the human body. The femur has a hemisphericaljoint surface, and the femur is embedded into the acetabulum to form thehip joint. As the femur has to support the weight from the body, oncepathological changes are found in the hip joint, the patient is unableto move normally, so that the patient's life quality is seriouslyaffected.

Generally speaking, when the blood deliver and supply of the human bodyshow the abnormality, it may cause necrosis of the tissues or organs. Interms of bones, when the deliver of blood is blocked to affect thetransfer of oxygen, nutrition and metabolite, osteonecrosis occurseasily. According to the clinical experience, osteonecrosis occurs inthe femur frequently. In the early stages of osteonecrosis of the femur,the core decompression is a commonly used treatment. For the first andthe second stages of osteonecrosis, the core decompression is effectiveto 70% of the patients. However, for the third stage of osteonecrosis,the success rate of the core decompression is only 20%.

In addition, as shown in many research results, although the coredecompression can ease the pain from osteonecrosis of the femur, thecore decompression can not prevent the illness from deteriorating. As aresult, the patient can only accept the replacement of the femur or thehip joint in the later stages (the fourth to the sixth stage) ofosteonecrosis, that is, when the femur collapses and arthritis occurs inthe femur. Therefore, the patient's life quality is affected, and themedical treatment cost is increased.

SUMMARY

The disclosure is directed to a bone repairing kit and a method for bonerepair. An osteonecrosis area in the femur of a patient can be rebuiltand repaired. Therefore, the patient's femur can be rebuilt and repairedin a single stage surgery without leaving the operating table, so thatthe repair effect is good through the short time operation.

According to one embodiment of the invention, a bone repairing kitincluding a drilling device, a pushing device, a clamping member and ahole saw is provided. The drilling device includes a tube body. An endof the tube body is a knife portion. The tube body is rotated withrespect to a femur, so that a bone column is cut from the femur by therotated knife portion. The bone column is located in the tube body. Thepushing device includes a hollow tube and a push bar. The hollow tube isused for receiving the tube body. The push bar is used for touching andpushing the bone column in the tube body from an end of the hollow tubewhen being rotated with respect to the hollow tube, so that the bonecolumn is pushed out from the tube body. The clamping member is used forclamping the pushed bone column. The hole saw includes a receiving bodyand several cutting knives. The receiving body has a recess forreceiving an end of the bone column. The cutting knives surround on aninner wall of the recess and used for cutting an edge of the end of thebone column when being rotated with respect to the bone column.

According to another embodiment of the invention, a drilling deviceincluding a tube body and a guiding assembly is provided. An end of thetube body is a knife portion. The guiding assembly includes apositioning hollow shaft, a first positioning ring and a first elasticmember. The positioning hollow shaft is detachably coupled to the otherend of the tube body, and used for being connected to a rotatingmechanism so as to drive the tube body to rotate when receiving arotating power. The first positioning ring is used for being received inthe tube body. The first elastic member is connected between thepositioning hollow shaft and the first positioning ring.

According to still another embodiment of the invention, a pushing deviceused for pushing an object from a receiver is provided. The pushingdevice includes a hollow tube and a push bar. The hollow tube is usedfor receiving the receiver. The push bar has a body and a touchingmember. The body is rotatably coupled to the hollow tube, and an end ofthe body is rotatably received in the touching member. When the bodyrotates with respect to the hollow tube, the touching membernon-rotatably touches and pushes the object in the receiver from an endof the hollow tube.

According to yet another embodiment of the invention, a clamping memberused for fixing an object is provided. The clamping member includes aclamping body, several elastic fixing clamps and a cover. The clampingbody has a fillister which is used for receiving the object. The elasticfixing clamps extend outward from the clamping body so as to surroundthe object. The cover is put around the elastic fixing clamps, so thatthe elastic fixing clamps are pushed inward to fix the object.

According to yet another embodiment of the invention, a hole saw usedfor cutting an object is provided. The hole saw includes a receivingbody and several cutting knives. The receiving body has a recess forreceiving an end of the object. The cutting knives surrounds on an innerwall of the recess and used for cutting an edge of the end of the objectwhen being rotated with respect to the object.

According to yet another embodiment of the invention, a method for bonerepair is provided. A bone column is obtained from a femur, wherein thebone column has an osteonecrosis area. After that, the osteonecrosisarea is removed from the bone column. Then, an end of the bone column isshaped. After that, the end of the bone column is put into a cavity of acarrier. Then, the bone column is replaced into the femur.

The invention will become apparent from the following detaileddescription of the preferred but non-limiting embodiments. The followingdescription is made with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A˜1F are the steps of repairing a femur by using a bone repairingkit.

FIGS. 2A and 2B are an assembling figure and an exploded figure of thedrilling device according to a preferred embodiment of the presentinvention, respectively.

FIGS. 3A and 3B are an exploded figure and a sectional view of thepushing device, respectively.

FIGS. 4A and 4B are a side view and an assembly figure of the clampingmember according to a preferred embodiment of the present invention,respectively.

FIGS. 5A and 5B are a front view and a sectional view of the hole sawaccording to a preferred embodiment of the invention, respectively.

DETAILED DESCRIPTION

The steps of repairing a femur by using a bone repairing kit accordingto the one embodiment of the invention are firstly illustrated by FIGS.1A˜1F. Referring to FIGS. 1A˜1F, the steps of repairing a femur by usinga bone repairing kit are shown. The bone repairing kit including adrilling device 100, a pushing device 200, a clamping member 300 and ahole saw 400 is used for repairing the femur of a patient.

As shown in FIG. 1A, let the femur Bt of the patient have anosteonecrosis area An as an example. The femur Bt is repaired in the oneembodiment of the invention. In order to position the osteonecrosis areaAn and the location and direction for drilling, a guide pin 500 is, forexample, drilled into the femur Bt and passes through the femoral neckBn, the center of the osteonecrosis area An and the cartilage Bs of thejoint.

The rotating mechanism 610 is connected to the drilling device 100 so asto drive the drilling device 100 to rotate with respect to the femur Bt.The bone column B is obtained by cutting as the drilling device 100moves along the guide pin 500, as shown in FIG. 1B. The obtained bonecolumn B is located in the tube body 110 of the drilling device 100, andincludes the hard bone, the cartilage Bs and the osteonecrosis area An.A tunnel h is formed in the femur Bt.

As shown in FIG. 1C, in order to take out the bone column B in the tubebody 110, the hollow tube 210 of the pushing device 200 receives thetube body 110 therein, and the push bar 220 of the pushing device 200pushes the bone column B from an end of the tube body 110. Theosteonecrosis area An and the cartilage Bs of the pushed bone column Bis, for example, cut off along the dotted line in FIG. 1C.

As shown in FIG. 1D, the bone column Br without the osteonecrosis areaAn and the cartilage Bs is clamped by the clamping member 300, and thehole saw 400 connected to the rotating mechanism 610 is rotated withrespect to the bone column Br so as to shape an end of the bone columnBr. As shown in FIG. 1D, the bone column Br has a protruding portionBr1. The radius of the protruding portion Br1 is smaller than those ofthe other parts of the bone column Br.

As shown in FIG. 1E, the shaped bone column Br is further processed soas to relocate into the tunnel h of the femur Bt.

As shown in FIG. 1F, the fixing member 800 is disposed at the terminalend of the bone column Br so as to fix the bone column Br in the femurBt. Therefore, the treatment and repair of the femur Bt are achieved.

The steps of the method for bone repair and the structure and operationof each of the components of the bone repairing kit are elaborated asfollows.

The drilling device 100 shown in FIGS. 1A and 1B is firstly described.Referring to FIGS. 2A and 2B, an assembling figure and an explodedfigure of the drilling device 100 according to an embodiment of theinvention are shown. The drilling device 100 is made of stainless steelor titanium alloys, for example, and the drilling device 100 includesthe tube body 110 and the guiding assembly 120. The inner radius and thelength of the tube body 110 can be determined according to the desireddiameter and length of the bone column B. For example, the inner radiusof the tube body 110 can range 2˜30 mm, and the length of the tube body110 can range 10˜250 mm.

An end 110 e 1 of the tube body 110 is the knife portion 111. The knifeportion 111 has several knives. The knives are arranged to form acylindrical surface. Therefore, the surface of the bone column B cut bythe knives can be smooth, and the inner surface of the tunnel h of thefemur Bt and the outer surface of the bone column B can also be smooth.In the embodiment of the invention, the profile of each of the kniveshas a first slanting side 111 s 1, a second slanting side 111 s 2 and abottom side 111 s 3 so as to form a concave. The first slanting side 111s 1, the bottom side 111 s 3 and the second slanting side 111 s 2 areconnected sequentially in the rotating direction D1 of the tube body110. The second slanting side 111 s 2 slants towards the direction D2which is opposite to the rotating direction of the tube body by an angleθ, and the angle θ ranges 1°˜8°. For example, if the tube body 110rotates clockwise in the direction D1 and the clockwise direction D1 ispositive, the angle θ that second slanting side 111 s 2 slants towardscan be, for example, −1°˜8°. Therefore, when the fiber cortical bone iscut by the knives, the situation that the surface of the bone is torncan be reduced. In addition, in order to reduce the fiction generatedwhen the chips are removed and avoid the heat generated when the cuttingprocess is performed to damage the tissue, the profile of each of theknives further has curved surfaces 111 c 1 and 111 c 2. The curvedsurface 111 c 1 is located between the first slanting side 111 s 1 andthe bottom side 111 s 3, and the curved surface 111 c 2 is locatedbetween the bottom side 111 s 3 and the second slanting side 111 s 2. Ifa length formed by projecting the first slanting side 111 s 1, thebottom side 111 s 3 and the second slanting side 111 s 2 onto a surfaceis a blade portion length L, the radius of curvature of the curvedsurface 111 c 1 is 0.1˜0.3 times the blade portion length L, and theradius of curvature of the curved surface 111 c 2 is 0.2˜0.5 times theblade portion length L.

In addition, the wall thickness 110 t of the tube body 110 is animportant factor to affect the magnitude of the axial resistance whenthe cutting process is performed and the bone regeneration after thebone column is relocated in the tunnel h. When the wall thickness 110 tof the tube body 110 is too thick, the gap between the bone columnrelocated in the tunnel h and the inner surface of the tunnel h is toolarge, so that the gap may be filled by the fiber tissue firstly toaffect the bone regeneration. Therefore, the wall thickness 110 t of thetube body 110 according to the present embodiment of the inventionranges 0.1˜2 mm, for example, so that the axial resistance generatedwhen the cutting process is performed can be reduced and the boneregeneration is not affected. Preferably, the wall thickness 110 t ofthe tube body 100 is 0.25 mm.

The guiding assembly 120 includes the positioning hollow shaft 121, thefirst positioning ring 122 a, the second positioning ring 122 b, thefirst elastic member 123 a and the second elastic member 123 b. Thepositioning hollow shaft 121 detachably coupled to the other end 110 e 2of the tube body 110 is used for being connected to the rotatingmechanism 610. The first positioning ring 122 a and the secondpositioning ring 122 b are received in the tube body 110. The firstelastic member 123 a is connected between the positioning hollow shaft121 and the first positioning ring 122 a, and the second elastic member123 b is connected between the first positioning ring 122 a and secondpositioning ring 122 b.

In the one embodiment of the invention, the connection between thepositioning hollow shaft 121 and the tube body 110 is achieved byinserting the pin 121 p of the positioning hollow shaft 121 into thesliding groove 110 h of the end 110 e 2 of the tube body 110. A portionof the sliding groove 110 h extends from the end 110 e 2 of the tubebody 110 towards the end 110 e 1 of the tube body 110, and the otherportion of the sliding groove 110 h extends towards a direction which isopposite to the rotating direction of the tube body 110. Therefore, whenthe positioning hollow shaft 121 is driven to rotate by the rotatingmechanism 610, the pin 121 p leans against the inner wall of the slidinggroove 110 h according to the shape design of the sliding groove 110 h,so that the positioning hollow shaft 121 can be stably coupled to thetube body 110.

As shown in FIGS. 1A, 1B, 2A and 2B, when the positioning hollow shaft121 is connected to the rotating mechanism 610 such as an electricaldrill, and the rotating power is outputted to the positioning hollowshaft 121 by the rotating mechanism 610, the positioning hollow shaft121 coupled to the tube body 110 receives the rotating power so as todrive the tube body 110 to rotate with respect to the femur Bt. As theguide pin 500 passes through the positioning hollow shaft 121, the firstelastic member 123 a, the first positioning ring 122 a, the secondelastic member 123 b and the second positioning ring 122 b sequentially,the tube body 110 moves along the guide pin 500. Therefore, the bonecolumn B which is cut by the knives of the knife portion 111 isgradually received into the tube body 110 and pushes the secondpositioning ring 122 b. As the cut bone column B becomes longer, thesecond positioning ring 122 b moves towards the first positioning ring122 a more, and the first elastic member 123 a and the second elasticmember 123 b are compressed. Lastly, the bone column B being a porousstructure is located in the tube body 110 because of the pressure, andthe guiding assembly 120 can be separated from the tube body 110according to the detachability feature. Therefore, the tunnel h isformed in the femur Bt.

Then, the pushing device 200 in FIG. 1C is elaborated herein. In orderto take out the bone column B in the tube body 110, the pushing device200 in FIGS. 3A and 3B is used for pushing the bone column B in thepresent embodiment of the invention. Referring to FIGS. 3A and 3B, anexploded figure and a sectional view of the pushing device 200 areshown, respectively. The pushing device 200 includes the hollow tube 210and the push bar 220. The hollow tube 210 is used for receiving the tubebody 110 with the bone column B therein. The push bar 220 is used fortouching and pushing the bone column B in the tube body 110 from an endof the hollow tube 210 when being rotated with respect to the hollowtube 210, so that the bone column B is pushed out from tube body 110.

In the one embodiment of the invention, the tube body 110 is fixed inthe hollow tube 210 by the screw 620, for example. The push bar 220 hasthe body 221 and the touching member 222. The body 221 is rotatablycoupled to the hollow tube 210 by way of being bolted to the hollow tube210, and is connected to the handle 230. An end 221 e of the body 221which is, for example, in shape of a sphere is rotatably received in thespherical recess 222 r of the touching member 222. The end 221 e of thebody 221 has a ring recess 221 r, and the touching member 222 has theengaging portion 222 e. The engaging portion 222 e is engaged in thering recess 221 r, so that the end 221 e of the body 221 is received inthe spherical recess 222 r.

In addition, the hollow tube 210 has a hole 210 h and several anti-slidegrooves 210 s. The hole 210 h is used for confirming if the tube body110 is put into the hollow tube 210. The anti-slide grooves 210 slocated at the outer surface of the hollow tube 210 are used forincreasing the fiction when the medical personnel holds the hollow tube210, so that the situation that the hollow tube 210 is slipped off fromthe hand of the medical personnel can be avoided.

Therefore, as shown in FIGS. 1C, 3A and 3B, the medical personnel canuse one hand to hold the hollow tube 210, and use the other hand todrive the body 221 to rotate with respect to the hollow tube 210 throughthe handle 230. The spherical end 221 e of the body 221 is rotatablyreceived in the spherical recess 222 r of the touching member 222.Therefore, when the body 221 is rotated with respect to the hollow tube210, the touching member 222 is non-rotatably touches the and pushes thebone column B in tube body 110, so that the bone column B is pushed out,and the situation that the bone column B is damaged due to the fictioncan be avoided. The bone column B pushed out from the tube body 110includes the hard bone, the cartilage Bs and the osteonecrosis area An.The cartilage Bs and the osteonecrosis area An of the bone column arecut off along the dotted line.

In the one embodiment of the invention, the hard bone of the bone columnB is touched and pushed by the touching member 222, so that the bonecolumn B is pushed out from the tube body 110. However, a person havingordinary skills in the art should know that through the dimension designof the pushing device, the bone column B can be pushed out from the tubebody 110 by touching and pushing the cartilage Bs of the bone column Bthrough the touching member 222.

After that, the clamping member 300 and the hole saw 400 in FIG. 1D isfurther elaborated. The clamping member 300 clamps the remained bonecolumn Br, and the hole saw 400 shapes the bone column Br. Referring toFIGS. 4A and 4B, a side view and an assembly figure of the clampingmember 300 according to an embodiment of the invention are shown,respectively. The clamping member 300 includes the clamping body 310,several elastic fixing clamps 320 and the cover 330. The clamping body310 has the fillister 310 r used for receiving the bone column Br. Theelastic fixing clamps 320 extend outward from the clamping body 310 soas to surround the bone column Br. The cover 330 is put around theelastic fixing clamps 320, so that the elastic fixing clamps 320 arepushed inward to fix the bone column Br.

The outer surface of the clamping body 310 has several anti-slidegrooves 310 s. The anti-slide grooves 310 s are used for increasing thefiction when the medical personnel holds the clamping body 310, so thatthe situation that the clamping body 310 is slipped off from the hand ofthe medical personnel can be avoided. In addition, in order to avoid thebone column Br being damaged due to the clamp of the elastic fixingclamps 320, the clamping member 300 can further includes a protectingring 340. The protecting ring 340 is put around the bone column Br so asbe located between the bone column Br and the elastic fixing clamps 320.Therefore, when the bone column Br is pressed by the elastic fixingclamps 320 as the cover 330 is put around the elastic fixing clamps 320,the protecting ring 340 such as silicon provide a buffer function so asto avoid the bone column Br being damaged. In addition, the fillister310 r has a first groove 310 r 1 and a second groove 310 r 2. The firstgroove 310 r 1 is connected to the second groove 310 r 2, and the innerradius of the first groove 310 r 1 is greater than the inner radius ofthe second groove 310 r 2, so that the protecting ring 340 can bepositioned between the elastic fixing clamps 320 and the bone column Brthrough the inner radius difference between the first groove 310 r 1 andthe second groove 310 r 2.

Referring to FIGS. 5A and 5B, a front view and a sectional view of thehole saw 400 according to an embodiment of the invention are shown,respectively. The hole saw 400 includes a receiving body 410 and severalcutting knives 420. The receiving body 410 had a recess 410 r. Thecutting knives 420 surround on an inner wall of the recess 410 r, andthe bottom surface 410 rs of the recess 410 r is lower than the cuttingknives 420. In the one embodiment of the invention, the two adjacentcutting knives 420 are spaced out a distance d apart, and the receivingbody 410 has several holes 410 h. The position of the hole 410 hcorresponds to the distance d so as to facilitate the removal of thechips.

As shown in FIGS. 1D, 4A, 4B, 5A and 5B, when the hole saw 400 starts tocut, the end of the bone column Br clamped by the clamping member 300 isput into the recess 410 r through the aligning ring 430 of the hole saw400. As the aligning ring 430 is fixed at the opening of the recess 410r, the aligning ring 430 guides the bone column Br, so that the bonecolumn Br can be located in the recess 410 r precisely. When the spindle411 of the receiving body 410 is connected to the rotating mechanism 610such as an electrical drill, the operation of the rotating mechanism 610is driven the hole saw 400 to rotate with respect to the bone column Br,so that an edge of the end of the bone column Br is cut. As the bottomsurface 410 rs of the recess 410 r is lower than the cutting knives 420,the bottom surface 410 rs is used for being a stop surface of thecutting knives 420. That is, when the front surface of the cut end ofthe bone column Br contacts the bottom surface 410 rs of the recess 410r, the cutting knives 420 are unable to cut the bone column Brcontinuously, so that the cut end of the bone column Br is shaped tohave the protruding portion Br1. Therefore, the dimension of the desiredbone column Br can be designed according to the dimensions of thecutting knives 420 and the bottom surface 410 rs of the recess 410 r.

In the one embodiment of the invention, as shown in FIG. 1E, the bonerepairing kit can further include the carrier 700 and enzymes. Thecarrier 700 includes the cartilage portion 721 and the bone portion 722so as to form the cavity 710. The carrier 700 can be made of abiodegradable material. For example, the cartilage portion 721 can bemade of a polymer material, and the bone portion 722 can be made of thecombination of a polymer material and a ceramic material so as toprovide the strength. The polymer material can be polylactide-glycolicacid (PLGA), and the ceramic material can be tricalcium phosphate (TCP).Or, the carrier 700 can be formed by the patient's decalcified autograftbone. Then, the cartilage Bs cut from the bone column B or the cartilageobtained from the patient's non-weight bearing site is cut intocartilage fragments f, and the dimension of the cartilage fragment franges 200˜2000 μm, for example. After that, the cartilage fragments fare processed by the enzymes so as to dissolve out portions of cartilagecells. The cartilage fragments f processed by the enzymes are put intothe cavity 710 of the carrier 700. Therefore, the protruding portion Br1of the bone column Br is received into the cavity 710, and the bonecolumn Br is relocated into the tunnel h of the femur Bt.

Preferably, the bone repairing kit can further include the fixing member800, and the fixing member 800 is in shape of a taper, for example. Asshown in 1F, when the bone column Br is relocated into the femur Bt, thefixing member 800 is put at the terminal end of the bone column Br so asto stably fix the bone column Br in the femur Bt. In the presentembodiment of the invention, the fixing member 800 can be a flexiblebiodegradable or non-biodegradable material. Or, the fixing member 800can be formed by the patient's autograft bone.

The bone repairing kit and the method for bone repair according to theembodiment of the invention, the bone column is obtained from thepatient's femur by the drilling device, and the osteonecrosis area iscut off. Then, the bone column located in the tube body is pushed out bythe pushing device. After that, the bone column is clamped by theclamping member, so that the edge of the end of the bone column is cutto form the protruding portion by the hole saw. The bone column with theprotruding portion is further combined with the carrier so as to replaceinto the patient's femur. Compared with the treatment of theosteonecrosis area of the femur through the artificial jointreplacement, the patient's femur can be rebuilt and repaired in a singlestage surgery without leaving the operating table, through the bonerepairing kit of the one embodiment of the invention, so that the repaireffect is good through the short time operation. Therefore, thepatient's life quality can be maintained and the medical treatment costcan be effectively reduced.

While the invention has been described by way of example and in terms ofa preferred embodiment, it is to be understood that the invention is notlimited thereto. On the contrary, it is intended to cover variousmodifications and similar arrangements and procedures, and the scope ofthe appended claims therefore should be accorded the broadestinterpretation so as to encompass all such modifications and similararrangements and procedures.

1. A bone repairing kit, comprising: a drilling device, comprising: atube body, wherein an end of the tube body is a knife portion, the tubebody is rotated with respect to a femur so as to cut a bone column fromthe femur by the rotated knife portion, and the bone column is locatedin the tube body; a pushing device, comprising: a hollow tube used forreceiving the tube body; and a push bar used for touching and pushingthe bone column in the tube body from an end of the hollow tube whenbeing rotated with respect to the hollow tube, so that the bone columnis pushed out from the tube body; a clamping member used for clampingthe pushed bone column; and a hole saw, comprising: a receiving bodyhaving a recess for receiving an end of the bone column; and a pluralityof cutting knives surrounding on an inner wall of the recess and usedfor cutting an edge of the end of the bone column when being rotatedwith respect to the bone column.
 2. The bone repairing kit according toclaim 1, wherein the drilling device further comprises: a guidingassembly, comprising: a positioning hollow shaft detachably coupled tothe other end of the tube body, wherein the positioning hollow shaft isused for being connected to a rotating mechanism so as to drive the tubebody to rotate when receiving a rotating power; a first positioning ringused for being received into the tube body; and a first elastic memberconnected between the positioning hollow shaft and the first positioningring.
 3. The bone repairing kit according to claim 2, wherein theguiding assembly further comprises: a second positioning ring used forbeing received into the tube body; and a second elastic member connectedbetween the first positioning ring and the second positioning ring. 4.The bone repairing kit according to claim 3, further comprising: a guidepin used for passing through the positioning hollow shaft, the firstelastic member, the first positioning ring, the second elastic memberand the second positioning ring, so that the tube body moves along theguide pin.
 5. The bone repairing kit according to claim 2, wherein thepositioning hollow shaft has a pin, the other end of the tube body has asliding groove, and the pin is inserted into the sliding groove.
 6. Thebone repairing kit according to claim 5, wherein a portion of thesliding groove extends from the other end of the tube body towards theend of the tube body, and the other portion of the sliding grooveextends towards a direction which is opposite to the rotating directionof the tube body.
 7. The bone repairing kit according to claim 1,wherein the inner radius and the length of the tube body are determinedaccording to the desired diameter and length of the bone column, theinner radius of the tube body ranges 2˜30 mm, and the length of the tubebody ranges 10250 mm.
 8. The bone repairing kit according to claim 1,wherein the knife portion has a plurality of knives, the profile of eachof the knives has a first slanting side, a second slanting side and abottom side, and the first slanting side, the bottom side and the secondslanting side are connected sequentially in the rotating direction ofthe tube body.
 9. The bone repairing kit according to claim 8, whereinthe second slanting side slants towards a direction which is opposite tothe rotating direction of the tube body by an angle, and the angleranges 1°˜8°.
 10. The bone repairing kit according to claim 8, wherein alength formed by projecting the first slanting side, the bottom side andthe second slanting side onto a surface is a blade portion length, theprofile of each of the knives further has a curved surface, the curvedsurface is located between the first slanting side and the bottom side,and the radius of curvature of the curved surface is 0.1˜0.3 times theblade portion length.
 11. The bone repairing kit according to claim 8,wherein a length formed by projecting the first slanting side, thebottom side and the second slanting side onto a surface is a bladeportion length, the profile of each of the knives further has a curvedsurface, the curved surface is located between the bottom side and thesecond slanting side, and the radius of curvature of the curved surfaceis 0.2˜0.5 times the blade portion length.
 12. The bone repairing kitaccording to claim 1, wherein the wall thickness of the tube body ranges0.1˜2 mm.
 13. The bone repairing kit according to claim 1, wherein theknife portion has a plurality of knives, and the knives are arranged toform a cylindrical surface.
 14. The bone repairing kit according toclaim 1, wherein the push bar has a body and a touching member, the bodyis rotatably coupled to the hollow tube, and an end of the body isrotatably received in the touching member; wherein, when the bodyrotates with respect to the hollow tube, the touching membernon-rotatably touches and pushes the bone column in the tube body. 15.The bone repairing kit according to claim 14, wherein the end of thebody is in shape of a sphere, and the touching member has a sphericalrecess for receiving the spherical end of the body.
 16. The bonerepairing kit according to claim 15, wherein the end of the body has aring recess, the touching member has an engaging portion, and theengaging portion is engaged in the ring recess.
 17. The bone repairingkit according to claim 1, wherein the push bar is bolted to the hollowtube.
 18. The bone repairing kit according to claim 1, wherein theclamping member comprises: a clamping body having a fillister which isused for receiving the pushed bone column; a plurality of elastic fixingclamps extending outward from the clamping body so as to surround thebone column; and a cover put around the elastic fixing clamps so thatthe elastic fixing clamps are pushed inward to fix the bone column. 19.The bone repairing kit according to claim 18, wherein the clampingmember further comprises: a protecting ring put around the bone columnso as to be located between the bone column and the elastic fixingclamps.
 20. The bone repairing kit according to claim 19, wherein thefillister has a first groove and a second groove, the first groove isconnected to the second groove, and the inner radius of the first grooveis greater than the inner radius of the second groove.
 21. The bonerepairing kit according to claim 1, wherein the two adjacent cuttingknives are spaced out a distance apart.
 22. The bone repairing kitaccording to claim 21, wherein the receiving body has at least one hole,and the position of the hole corresponds to the position of thedistance.
 23. The bone repairing kit according to claim 1, wherein thebottom surface of the recess is lower than the cutting knives and isused for contacting the front surface of the bone column.
 24. The bonerepairing kit according to claim 1, wherein the hole saw furthercomprises: a aligning ring fixed to an opening of the recess.
 25. Thebone repairing kit according to claim 1, wherein the receiving bodyfurther has a spindle used for being connected to a rotating mechanism.26. The bone repairing kit according to claim 1, further comprising: afixing member used for fixing the bone column into the femur.
 27. Thebone repairing kit according to claim 26, wherein the fixing member isin shape of a taper.
 28. The bone repairing kit according to claim 1,further comprising: a carrier has a cavity used for receiving the end ofthe bone column which is cut by the hole saw.
 29. The bone repairing kitaccording to claim 28, wherein the bone repairing kit is used forrepairing the femur of a patient, the carrier comprises a cartilageportion and a bone portion so as to form the cavity, and the carrier ismade of a biodegradable material or a decalcified autograft bone.
 30. Amethod for bone repair, comprising: (a) obtaining a bone column from afemur, wherein the bone column has an osteonecrosis area; (b) removingthe osteonecrosis area from the bone column; (c) shaping an end of thebone column; (d) putting the end of the bone column into a cavity of acarrier; and (e) replacing the bone column into the femur.
 31. Themethod according to claim 30, wherein the step (a) comprises: (a1)rotating a tube body with respect to the femur so as to cut the bonecolumn from the femur, wherein the bone column is located in the tubebody; and (a2) obtaining the bone column from the tube body.
 32. Themethod according to claim 31, wherein before the step (a1), the methodfurther comprises: placing a guide pin into the femur to pass throughthe osteonecrosis area, so that the tube body moves along the guide pinwhen being rotated.
 33. The method according to claim 31, wherein thestep (a2) comprises: (a21) putting the tube body with the bone columntherein into a hollow tube; and (a22) rotating a push bar with respectto the hollow tube so as to touch and push the bone column in the tubebody from an end of the hollow tube.
 34. The method according to claim33, wherein the push bar comprises a body and a touching member, thetouching member is rotatably coupled to the body, and in the step (a22),when the body rotates with respect to the hollow tube, the touchingmember non-rotatably touches and pushes the bone column in the tubebody.
 35. The method according to claim 30, wherein before the step (d),the method further comprises: putting cartilage fragments treated withenzymes in the cavity of the carrier.
 36. The method according to claim35, wherein the bone column further has a cartilage, and the cartilageis removed from the bone column in the step (b) and is cut into thecartilage fragments and treated with enzymes before the step (d). 37.The method according to claim 30, wherein the step (c) comprises: usinga clamping member to fix the bone column; and rotating a hole saw withrespect to the bone column so as to cut an edge of the end of the bonecolumn.
 38. The method according to claim 30, further comprising: usinga fixing member to fix the bone column in the femur.